Urethane-fortified alkyd resin formulated to dry to hard but not brittle finish. Tougher than polyurethane; more resistant to checking, chipping and cracking, able to withstand greater shock impact and dramatic temperature changes, and less likely to yell
Milwaukee® Thunderbolt® Black Oxide jobber length drill bits are designed for extreme durability and long life. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips fast, while the 3-Flat Secure-Grip™ shank holds the bit firmly in the drill chuck. The 135° split point tip delivers a precision start and prevents walking for fast, accurate holes.
